While the price of the ACT registration can vary each year, you can find the pricing for both writing and no writing here, on the official ACT test page.
The prices listed there are given for the ACT with and without the writing test. Score reports for the 5th and 6th college choices are refundable should you not use them.
The registration fee listed is a normal fee for the administration of the test your register for, while the late fee is charged if you register after the regular deadline but prior to the final late deadline.
Read the page carefully, because late fees and test date changes can have a major impact on the price of your ACT test.